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The Encyclopedia of Gemstones and Minerals

Holden, Martin

ISBN 10: 0816021775 / ISBN 13: 9780816021772
Editore: New York, New York, U.S.A.: Facts on File, 1991
Usato Condizione: As New Rilegato
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Review. 303p, 9x12 inches, bibliog., ndx. Full Color review of world minerals and gems. Codice inventario libreria 88-0153

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Dati bibliografici

Titolo: The Encyclopedia of Gemstones and Minerals

Casa editrice: New York, New York, U.S.A.: Facts on File

Data di pubblicazione: 1991

Legatura: Hardcover

Condizione libro:As New

Condizione sovraccoperta: As New

Edizione: 1st Edition

Descrizione articolo

Riassunto:

This work offers information on the properties/values of over 200 rocks, stones, jewels and other natural substances. From amber to zinc, and from diamond-edged blades to orthoclase-based porcelains, details about characteristic form, specific gravity, symmetry system, refraction, location, use and commercial value are provided. Among the varied types of information given is a description of the largest diamond ever mined, the fist-sized 3106-carat Culliam diamond which was found in South Africa in 1905 and which now forms part of the British Crown Jewels; an explanation of how the mediaeval alchemists postulated that gold must be divine because it is incorruptible; and an explanation of the low specific gravity of amber and how this can be used as a test for authenticity.

From School Library Journal:

YA-- This fascinating reference source will be eagerly sought by rock hounds as it pulls together into one book data usually found in a variety of references. It is a perfect balance between an encyclopedia and a rock-identification handbook. Alphabetically arranged, it allows readers to look up groups of or individual minerals and their physical properties. Also included are some history and folklore surrounding the gems. Descriptions move from chemical analysis through geologic formation and on to the use of the stones, stressing the overall role of nature itself in rock formation. The excellent photos and graphics will facilitate identification and provide information on classification, hardness, gravity, etc. The index is a vital tool as no cross references are provided in the basic text (i. e., information on rubies is under corundum). --Claudia Moore, W. T. Woodson High Sch . , Fairfax, VA
Copyright 1992 Reed Business Information, Inc.

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